Pre-charged tanks are rated to compare with equivalent-size conventional (standard) tanks in terms of water draw down between pump cycles. The actual physical size of a pre-charged tank is much less and allows space savings up to 50% when comparing drawdown and size to that of a conventional tank. Economy is achieved with the smaller size of pre-charged tanks compared to similar water delivery and size of conventional tanks. This tank has a rated size of 6 gallons; the actual tank capacity is 2 gallons. U.S.A. Material: Steel, Max. Capacity (gal.): 6, Max. PSI: 50, Discharge Port (in.): 3/4, Dimensions D x H (in.): 8 5/8 x 12 11/16